Technical
description and composition of the SONY KDL-46R473A TV, panel type and
applicable modules. The composition of the modules.SONY LED
Model: KDL-46R473A
Chassis / Version: RB1FK
Panel: S460DH1-1
LED backlight: SVG460AB1_REV3_121121
T-CON: 46_KSZ_S100_SR4LV0.2
LED driver (backlight): integrated into PSU
PWM LED driver: BD9488F
MOSFET LED driver: KF5N50FZA
Power Supply (PSU): APS-350 1-474-488-11 GL5
PWM Power: MIP2H2 (Standby), CXA3810M (PFC & PWM resonant)
MOSFET Power: KF11N50F (PFC), KF5N50FZA
MainBoard: 1-895-375-51 1P-012CJ01-4010 Y200A520A
IC MainBoard: CPU: MT5367ZUHU; DRAM: K482G1646E
Tuner: SUT-RE227TN
Control: IR: FY13ODM_PP_HF_HIR 1P-112B801-2010
Technical Specifications KDL-46R473A
SONY KDL-46R473A
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the TV SONY KDL-46R473A, it is advisable to start with an external examination of its external and internal elements. In some cases, visible external damage to the elements can indicate the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of electronic circuit nodes. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
If the SONY KDL-46R473A does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module failure. In some cases, only the processor power regulator may be faulty. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If the SONY KDL-46R473A does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
To check the health of the LEDs, as well as contact connections in the ruler circuit, the panel must be disassembled.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
In cases where the SONY KDL-40R473A has no image, but there is sound, the display backlight often does not work.
In LED TVs, the LEDs inside the S400DH1-3 panel are usually faulty, and less often the LED driver.
Without backlighting, sometimes you can see a barely noticeable image with a certain successful hit of external light on the screen.
Replacing the LEDs requires disassembling the S400DH1-3 panel. We do not recommend such works on their own to TV owners and craftsmen who do not have experience in repairing LCD panels, especially at home.
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and on an open TV, the light is visible through the holes in the panel case.
In this case, the T-CON (Timing Controller) board may be faulty, but often the MainBoard 1-895-375-51 is also faulty. A software failure is also possible. The panel may also be faulty - damage to strips, loops, for example, after moisture ingress. In such cases, first of all, it is necessary to check the panel supply voltage at the LVDS connector, fuses on the T-CON board or panel brackets, as well as supply and reference voltages for column and line drivers - VGH, VGL, Vcom.
If they are within the normal range, then the oscilloscope must track the passage of LVDS signals from MainBoard 1-895-375-51, as well as synchronization signals to the loops with drivers.
Flooded screens of LED TVs can sometimes be restored if no significant damage has formed in the loops and on the panel trims.
Remember! Attempts to self-repair by users of the SONY KDL-46R473A TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
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The appearance of MainBoard 1-895-375-51 is shown in the figure below:1-895-375-51
1-895-375-51 can be used in TVs:
SONY KDL-40R473A (Panel S400DH1-3), SONY KDL-40R474A (Panel S400DH1-2), SONY KDL-46R473A (Panel S460DH1-1).
The appearance of the power supply
Main features of the device SONY KDL-46R473A:
Installed matrix (LED panel) S460DH1-1.
The matrix control uses the Timing Controller (T-CON) 46_KSZ_S100_SR4LV0.2.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the BD9488F PWM controller. As the power elements of the LED driver, keys of the type KF5N50FZA are used.
The necessary supply voltages for all nodes of the SONY KDL-46R473A TV are generated by the APS-350 power supply module or its analogs using MIP2H2 (Standby), CXA3810M (PFC & PWM resonant) microcircuits and power switches of the KF11N50F (PFC), KF5N50FZA type.
MainBoard - the main board (motherboard) is a module 1-895-375-51, using CPU chips: MT5367ZUHU; DRAM: K482G1646E and others.
The SUT-RE227TN tuner provides television reception and channel tuning.
SONY TV KDL-40R473A with LCD S400DH1-3, diagonal size 40 "(102 cm) 16: 9 format. The LCD panel uses Direct LED backlighting.
The S400DH1-3 sensor and MainBoard 1-895-375-51 software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution in 1080p (Full HD). The input analog video signal can be processed in PAL, SECAM, NTSC systems. Graphic processing and formation of a digital signal picture occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Video processor supported media file formats: MP3, WMA, MPEG4, JPEG.
Sound speaker power 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, HDMI x2, USB. A headphone output is provided. To connect an analog computer or laptop to this TV model, a VGA (D-Sub 15) connector is used, which supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The digital tuner is capable of receiving television channels in DVB-T, DVB-C, DVB-T2 standards.
The power consumed when operating from the mains is 87 W. APS-349 power supply.
Dimensions: with stand 923x574x184 mm, without stand 923x548x76 mm.
TV weight: with stand: 7.6 kg, without stand: 7.3 kg.
Attention! S400DH1-3 panel of SONY KDL-40R473A LED TV is its most expensive element.
Avoid impacts on the glass and excessive pressure on the screen surface to avoid damage to the LED panel!
It is unsafe for any liquid to spill on the screen. Sometimes one drop of water is enough, if it flows down the glass onto the plumes, the TV may become unrepairable.